<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./lib/vue-2.6.12.js"></script>
</head>
<body>
 
    <div id="app">
        {{num}}
    
        <button @click="num+=1">+1</button>
        <input type="text" @input="keypress">
        <input type="text" @keyup="keyup">
    </div>
    <script>
        let vm=new Vue({
            el:'#app',
            data:{
              num:1 
            },
            methods:{
           
                keypress(){
                    console.log(123);
                },
           
                keyup(){
                   console.log(456); 
                }
            }
        })
     
    </script>
</body>
</html>